CN103027708A - Monitoring method and monitoring system for operating state of ultrasonic transducer - Google Patents
Monitoring method and monitoring system for operating state of ultrasonic transducer Download PDFInfo
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- CN103027708A CN103027708A CN2011103003559A CN201110300355A CN103027708A CN 103027708 A CN103027708 A CN 103027708A CN 2011103003559 A CN2011103003559 A CN 2011103003559A CN 201110300355 A CN201110300355 A CN 201110300355A CN 103027708 A CN103027708 A CN 103027708A
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Abstract
The invention provides a monitoring method and a monitoring system for the operating state of an ultrasonic transducer, which belong to the field of medical ultrasonic therapy. The monitoring method for the operating state of the ultrasonic transducer includes the following steps: acquiring the current operating state of the ultrasonic transducer; comparing the current operating state of the ultrasonic transducer with a preset operating state; and controlling the operating parameters of the ultrasonic transducer according to a comparison result, so that the ultrasonic transducer can be in the preset operating state. The technical scheme of the invention can enhance the safety of the ultrasonic transducer in use and increase the quality of ultrasonic therapy.
Description
Technical field
The present invention relates to medical supersonic treatment field, refer to especially a kind of method for supervising and device of duty of ultrasonic transducer.
Background technology
As everyone knows, ultrasound wave and tissue interact and can produce some biological tissues effect.According to hyperacoustic local sound intensity height and sound wave radiation pattern, these biological tissue's effects can be divided into heat effect and non-thermomechanical effect.Organize the heat effect phalangeal cell to cause it to be warming up to the heat necrosis to the absorption of ultrasonic energy.Organize non-thermomechanical effect to refer to because phenomenons such as the cellular activity that acoustic cavitation, acoustic streaming and local small amplitude motion cause increases and then cellular morphology is produced changes, break, apoptosis.The physical factor that affects the ultrasound biological organizational effect comprises sound field focusing form, frequency of sound wave, acoustic pressure amplitude, the continuous or factors such as pulse sound radiation pattern (pulse recurrence frequency and dutycycle), standing-wave condition, the static pressure of medium, temperature, viscid state and boundary condition.
In recent years, hyperacoustic biological tissue effect is subject to broad research and application day by day in the ultrasonic field for the treatment of.The application that high intensity ultrasound treatment melts at neoplastic fevers, external knock wave is pulverized the aspects such as urinary stone, drug conveying, block nerves conduction has new progress.
In fat-reducing and cosmetic applications field, ultrasound wave also manifests its unique advantage, for example adopts the auxiliary Wicresoft of external low frequency ultrasound wave liposuction procedures can strengthen local fat and destroys efficient.The method and apparatus that adopts external emission high-intensity focusing ultrasonic wave to destroy regional adipose tissue is separately experiencing clinical verification, and manifests its curative effect, and its safety also obtains preliminary identification.This type for the treatment of is often selected first and is needed area for treatment, then adopt the External ultrasound transducers transmit ultrasonic waves to focus in the subcutaneous layer of fat, at current focal spot region destruction of adipose tissue, and pointwise is moved transducer and is changed the focal position and cover required area for treatment based on hyperacoustic tissue heat effect or mechanical effect principle.Under suitable area for treatment and dosage condition, the fatty tissue of ultrasonic disruption is decomposed from the body metabolism cycle via human body.
In ultrasonic therapeutic, because the discreteness of ultrasonic transducer piezoelectric self character, and operation parameter and the working environment in when treatment often are not quite similar, so that the output energy of ultrasonic transducer is with changing service time, and ultrasonic output energy can affect concordance and the effectiveness of therapeutic quality.More dangerous is if ultrasonic transducer or its drive circuit break down, from the angle consideration of safety, in the urgent need to can stop at once treatment when energy exceeds secure border, to avoid further injury.Therefore, the duty of ultrasonic transducer is monitored the important clinical safety problem that becomes a urgent need solution.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method for supervising and device of duty of ultrasonic transducer, can carry out Real Time Monitoring to the duty of ultrasonic transducer, and the running parameter of suitable feedback adjusting ultrasonic transducer, thereby increase the safety that ultrasonic transducer uses, and promote the ultrasonic therapeutic quality.
For solving the problems of the technologies described above, embodiments of the invention provide technical scheme as follows:
On the one hand, provide a kind of method for supervising of duty of ultrasonic transducer, comprising:
Obtain the current duty of ultrasonic transducer;
The current duty of more described ultrasonic transducer and default duty;
Control the running parameter of described ultrasonic transducer according to comparative result, so that described ultrasonic transducer is in default duty.
Further, the described current duty of obtaining ultrasonic transducer comprises:
Input signal to described ultrasonic transducer utilizes sample-hold circuit to carry out envelope detected, obtains respectively the voltage signal of described ultrasonic transducer and the range value of current signal;
Measure the voltage signal of described ultrasonic transducer and the phase contrast of current signal;
Actual electric power value according to range value and the described ultrasonic transducer of the two phase difference calculating of described voltage signal, current signal;
The current duty of described ultrasonic transducer and default duty are controlled the running parameter of described ultrasonic transducer according to comparative result, comprise so that described ultrasonic transducer is in default duty:
Described actual electric power value is compared with default electrical power value, default maximum electromotive power output value;
When described actual electric power value is in default permission excursion, adjust input signal amplitude or the gain of the power amplifier of described ultrasonic transducer, so that described actual electric power value reaches default electrical power value; Or
When described actual electric power value exceeds default permission excursion, the alarm user; Or
When described actual electric power value exceeds default maximum electromotive power output value, cut off electrical power output and the alarm user of described ultrasonic transducer.
Further, the described current duty of obtaining ultrasonic transducer comprises:
Adopt radiofrequency signal bidirectional power bonder that forward and the reverse radio-frequency signal of described ultrasonic transducer are measured, obtain its forward and reverse voltage signal, calculate the voltage reflection standing-wave ratio of described ultrasonic transducer;
The current duty of described ultrasonic transducer and default duty are controlled the running parameter of described ultrasonic transducer according to comparative result, comprise so that described ultrasonic transducer is in default duty:
Described voltage reflection standing-wave ratio is compared with predetermined threshold value, default max-thresholds;
When described voltage reflection standing-wave ratio is between predetermined threshold value and the default max-thresholds, adjust the power amplifier output of described ultrasonic transducer so that the voltage reflection standing-wave ratio of described ultrasonic transducer reaches predetermined threshold value; Or
When described voltage reflection standing-wave ratio is higher than default max-thresholds, cut off power amplifier output and the alarm user of described ultrasonic transducer.
Further, the described current duty of obtaining ultrasonic transducer comprises:
Detect its fundamental frequency from the radiofrequency signal spectral domain of described ultrasonic transducer, and measure the voltage signal of ultrasonic transducer under the described fundamental frequency and the phase difference value of current signal;
The current duty of described ultrasonic transducer and default duty are controlled the running parameter of described ultrasonic transducer according to comparative result, comprise so that described ultrasonic transducer is in default duty:
Described phase difference value is compared with default phase difference value;
When described phase difference value exceeds the preset difference value scope, adjust the output radio frequency signal frequency of the power amplifier of described ultrasonic transducer, described phase difference value is in the preset difference value scope.
The embodiment of the invention also provides a kind of supervising device of duty of ultrasonic transducer, comprising:
Acquisition module is for the current duty of obtaining ultrasonic transducer;
Processing module is used for the current duty of more described ultrasonic transducer and the duty of presetting;
Control module is for the running parameter of controlling described ultrasonic transducer according to comparative result, so that described ultrasonic transducer is in default duty.
Further, described acquisition module comprises:
First obtains submodule, be used for utilizing sample-hold circuit to carry out envelope detected to the input signal of described ultrasonic transducer, obtain respectively the voltage signal of described ultrasonic transducer and the range value of current signal, measure the voltage signal of described ultrasonic transducer and the phase contrast of current signal, according to the actual electric power value of range value and the described ultrasonic transducer of the two phase difference calculating of described voltage signal, current signal;
Described processing module comprises:
First processes submodule, is used for described actual electric power value is compared with default electrical power value, default maximum electromotive power output value;
Described control module comprises:
The first control submodule is used for adjusting input signal amplitude or the gain of the power amplifier of described ultrasonic transducer, so that described actual electric power value reaches default electrical power value when described actual electric power value is in default permission excursion; Or
When described actual electric power value exceeds default permission excursion, the alarm user; Or
When described actual electric power value exceeds default maximum electromotive power output value, cut off electrical power output and the alarm user of described ultrasonic transducer.
Further, described acquisition module comprises:
Second obtains submodule, is used for adopting radiofrequency signal bidirectional power bonder that forward and the reverse radio-frequency signal of described ultrasonic transducer are measured, and obtains its forward and reverse voltage signal, calculates the voltage reflection standing-wave ratio of described ultrasonic transducer;
Described processing module comprises:
Second processes submodule, is used for described voltage reflection standing-wave ratio is compared with predetermined threshold value, default max-thresholds;
Described control module comprises:
The second control submodule is used for when described voltage reflection standing-wave ratio is between predetermined threshold value and the default max-thresholds, adjusts the power amplifier output of described ultrasonic transducer so that the voltage reflection standing-wave ratio of described ultrasonic transducer reaches predetermined threshold value; Or
When described voltage reflection standing-wave ratio is higher than default max-thresholds, cut off power amplifier output and the alarm user of described ultrasonic transducer.
Further, described acquisition module comprises:
The 3rd obtains submodule, is used for detecting its fundamental frequency from the radiofrequency signal spectral domain of described ultrasonic transducer, and measures the voltage signal of ultrasonic transducer under the described fundamental frequency and the phase difference value of current signal;
Described processing module comprises:
The 3rd processes submodule, is used for described phase difference value is compared with default phase difference value;
Described control module comprises:
The 3rd control submodule is used for adjusting the output radio frequency signal frequency of the power amplifier of described ultrasonic transducer when described phase difference value exceeds the preset difference value scope, and described phase difference value is in the preset difference value scope.
Embodiments of the invention have following beneficial effect:
In the such scheme, at first obtain the current duty of ultrasonic transducer, the relatively current duty of ultrasonic transducer and default duty, and according to the running parameter of comparative result control ultrasonic transducer, so that ultrasonic transducer is in default duty.The embodiment of the invention can be carried out Real-Time Monitoring to the working condition of ultrasonic transducer, and suitable feedback adjusting running parameter, increases the safety that ultrasonic transducer uses, and the quality that promotes ultrasonic therapeutic.
Description of drawings
Fig. 1 is the schematic flow sheet of method for supervising of duty of the ultrasonic transducer of the embodiment of the invention;
Fig. 2 is the structured flowchart of supervising device of duty of the ultrasonic transducer of the embodiment of the invention.
The specific embodiment
For technical problem, technical scheme and advantage that embodiments of the invention will be solved is clearer, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
The technical problem to be solved in the present invention provides a kind of method for supervising and device of duty of ultrasonic transducer, can carry out Real Time Monitoring to the duty of ultrasonic transducer, and the running parameter of suitable feedback adjusting ultrasonic transducer, thereby increase the safety that ultrasonic transducer uses, and promote the ultrasonic therapeutic quality.
Fig. 1 is the schematic flow sheet of method for supervising of duty of the ultrasonic transducer of the embodiment of the invention, and as shown in Figure 1, present embodiment comprises:
Step 101: the current duty of obtaining ultrasonic transducer;
Step 102: the current duty and the default duty that compare ultrasonic transducer;
Step 103: according to the running parameter of comparative result control ultrasonic transducer, so that ultrasonic transducer is in default duty.
The method for supervising of the duty of the ultrasonic transducer of the embodiment of the invention, at first obtain the current duty of ultrasonic transducer, the current duty and the default duty that compare ultrasonic transducer, and according to the running parameter of comparative result control ultrasonic transducer, so that ultrasonic transducer is in default duty.The embodiment of the invention can be carried out Real-Time Monitoring to the working condition of ultrasonic transducer, and suitable feedback adjusting running parameter, increases the safety that ultrasonic transducer uses, and the quality that promotes ultrasonic therapeutic.
Fig. 2 is the structured flowchart of supervising device of duty of the ultrasonic transducer of the embodiment of the invention, and as shown in Figure 2, present embodiment comprises:
Further, the current duty of ultrasonic transducer can comprise the actual electric power value of ultrasonic transducer, and acquisition module 20 comprises:
First obtains submodule, be used for utilizing sample-hold circuit to carry out envelope detected to the input signal of ultrasonic transducer, obtain respectively the voltage signal of ultrasonic transducer and the range value of current signal, measure the voltage signal of ultrasonic transducer and the phase contrast of current signal, according to the actual electric power value of range value and the two phase difference calculating ultrasonic transducer of voltage signal, current signal;
First processes submodule, is used for the actual electric power value is compared with default electrical power value, default maximum electromotive power output value;
The first control submodule is used for adjusting input signal amplitude or the gain of the power amplifier of ultrasonic transducer, so that the actual electric power value reaches default electrical power value when the actual electric power value is in default permission excursion; Or
When the actual electric power value exceeds default permission excursion, the alarm user; Or
When the actual electric power value exceeds default maximum electromotive power output value, cut off electrical power output and the alarm user of ultrasonic transducer.
Further, the current duty of ultrasonic transducer can comprise the voltage reflection standing-wave ratio of ultrasonic transducer, and acquisition module 20 comprises:
Second obtains submodule, is used for adopting radiofrequency signal bidirectional power bonder that forward and the reverse radio-frequency signal of ultrasonic transducer are measured, and obtains its forward and reverse voltage signal, calculates the voltage reflection standing-wave ratio of ultrasonic transducer;
Second processes submodule, is used for the voltage reflection standing-wave ratio is compared with predetermined threshold value, default max-thresholds;
The second control submodule is used for when the voltage reflection standing-wave ratio is between predetermined threshold value and the default max-thresholds, adjusts the power amplifier output of ultrasonic transducer so that the voltage reflection standing-wave ratio of ultrasonic transducer reaches predetermined threshold value; Or
When the voltage reflection standing-wave ratio is higher than default max-thresholds, cut off power amplifier output and the alarm user of ultrasonic transducer.
Further, the current duty of ultrasonic transducer can comprise the voltage signal of ultrasonic transducer and the phase difference value of current signal, and acquisition module 20 comprises:
The 3rd obtains submodule, is used for detecting its fundamental frequency from the radiofrequency signal spectral domain of ultrasonic transducer, and measures the voltage signal of ultrasonic transducer under the fundamental frequency and the phase difference value of current signal;
The 3rd processes submodule, is used for phase difference value is compared with default phase difference value;
The 3rd control submodule is used for adjusting the output radio frequency signal frequency of the power amplifier of ultrasonic transducer when phase difference value exceeds the preset difference value scope, and phase difference value is in the preset difference value scope.
The supervising device of the duty of the ultrasonic transducer of the embodiment of the invention, can obtain the current duty of ultrasonic transducer, the current duty and the default duty that compare ultrasonic transducer, and according to the running parameter of comparative result control ultrasonic transducer, so that ultrasonic transducer is in default duty.The embodiment of the invention can be carried out Real-Time Monitoring to the working condition of ultrasonic transducer, and suitable feedback adjusting running parameter, increases the safety that ultrasonic transducer uses, and the quality that promotes ultrasonic therapeutic.
The below is elaborated to the method for supervising of the duty of ultrasonic transducer of the present invention.The ultrasonic transducer duty of indication refers to the electrical installation state of ultrasonic transducer and system's (comprise its piezoelectric and impedance matching circuit, and drive power amplifier) thereof in the present invention.
The actual electric power value of embodiment one monitoring ultrasonic transducer
At first adopt circuit methods to measure in real time running voltage and the electric current of ultrasonic transducer, input signal to ultrasonic transducer utilizes sample-hold circuit to carry out envelope detected, obtain its envelope voltage value and current value, and the phase contrast of measurement voltage signal and current signal, then according to the range value of voltage signal, the range value of current signal and the actual electric power value of the two phase difference calculating ultrasonic transducer.
This actual electric power value and the electromotive power output value of presetting are compared, adjust the output of power amplifier according to difference and (adjust input signal amplitude or adjust the power amplifier gain.When actual electric power value during less than default electromotive power output value, increase the gain of input signal amplitude or power amplifier; When actual electric power value during greater than default electromotive power output value, reduce the gain of input signal amplitude or power amplifier) so that the actual electric power value of output meets default scope.When the actual electric power value is higher or lower than certain error margin of default electromotive power output value, or excursion is when exceeding default permission excursion, the alarm user.When the actual electric power value exceeded the maximum electromotive power output value of systemic presupposition, the output of cut-out electrical power also reported an error.
The voltage reflection standing-wave ratio of embodiment two monitoring ultrasonic transducers
Adopt radiofrequency signal bidirectional power bonder that forward and the reverse radio-frequency signal of ultrasonic transducer are measured, obtain its just/reverse voltage signal, accordingly calculating voltage reflection standing-wave ratio.According to gross output and the voltage reflection standing-wave ratio of ultrasonic transducer, can calculate ultrasonic transducer incident electrical power and reflection electrical power numerical value.
Too high voltage reflection standing-wave meter is shown with more electrical power and is reflected back toward the power amplifier outfan, may be owing to there was big-difference (being excessive impedance mismatching) between the real part of the electrical impedance real part of ultrasonic transducer and power amplifier output impedance, thereby affect the duty of power amplifier, can change by the output radio frequency signal frequency that changes the ultrasonic transducer power amplifier output impedance of power amplifier, or change the power amplifier output impedance matching networks and reduce the impedance mismatching degree, thereby adjust the power amplifier output of ultrasonic transducer so that the voltage reflection standing-wave ratio of ultrasonic transducer reaches predetermined threshold value.When this voltage reflection standing-wave ratio is higher than default max-thresholds, cut off output and the alarm user of ultrasonic transducer power amplifier.
The emission parameter of embodiment three monitoring ultrasonic transducers
At first the radiofrequency signal spectral domain from ultrasonic transducer detects its fundamental frequency, calculates the two phase contrast from voltage signal and the current signal that records.If the voltage signal under this fundamental frequency and the phase contrast of current signal exceed default difference range, represent that then may there be mismatch in the output of this power amplifier and the input impedance of ultrasonic transducer, need output impedance or the change power amplifier output impedance matching networks of the output radio frequency signal frequency change power amplifier of adjustment power amplifier to reduce the impedance mismatching degree, correct this phase contrast to the difference range that allows, so that the impedance at two ends is mated again, obtain best electro-acoustic conversion efficiency.Guarantee that ultrasonic transducer stably is operated in suitable operating frequency, transmitting power, can keep suitable electro-acoustic conversion efficiency.
Monitoring to the duty of ultrasonic transducer is not limited to above embodiment, can also after suitably decaying, adopt analogue-digital converting method to carry out digital sample to the power radiofrequency signal of ultrasonic transducer, utilize digital signal processing method, obtain amplitude and the phase frequency spectrum information of this radiofrequency signal, control afterwards the power amplifier parameter of ultrasonic transducer, so that the amplitude of this radiofrequency signal and phase frequency spectrum information reach predetermined value.
Above-described embodiment can by detecting the real time operation state of the parameter monitoring ultrasonic transducers such as voltage, electric current, also can be monitored by indirect means such as ultrasonic transducer electro-acoustic conversion efficiencies.
After the ultrasonic transducer duty that above-mentioned Real-Time Monitoring is obtained is analyzed judgement, can carry out the information feedback to the operator, show the ultrasonic transducer duty, in order to duty is controlled, and for quality control and analysis after the ultrasonic therapeutic.Particularly, can adopt will the feed current signal of ultrasonic transducer of magnet coil to be coupled to lumination of light emitting diode, show that ultrasonic transducer is in emission state.The signal of monitoring can also be shown at the function software interface, and the corresponding fault-tolerant measure when in system hardware and software, realizing above-mentioned monitor signal out-of-bounds, or prompting operation person intervenes.
In each embodiment of the method for the present invention; the sequence number of described each step can not be used for limiting the sequencing of each step; for those of ordinary skills, under the prerequisite of not paying creative work, the priority of each step is changed also within protection scope of the present invention.
The above is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (8)
1. the method for supervising of the duty of a ultrasonic transducer is characterized in that, comprising:
Obtain the current duty of ultrasonic transducer;
The current duty of more described ultrasonic transducer and default duty;
Control the running parameter of described ultrasonic transducer according to comparative result, so that described ultrasonic transducer is in default duty.
2. the method for supervising of the duty of ultrasonic transducer according to claim 1 is characterized in that, the described current duty of obtaining ultrasonic transducer comprises:
Input signal to described ultrasonic transducer utilizes sample-hold circuit to carry out envelope detected, obtains respectively the voltage signal of described ultrasonic transducer and the range value of current signal;
Measure the voltage signal of described ultrasonic transducer and the phase contrast of current signal;
Actual electric power value according to range value and the described ultrasonic transducer of the two phase difference calculating of described voltage signal, current signal;
The current duty of described ultrasonic transducer and default duty are controlled the running parameter of described ultrasonic transducer according to comparative result, comprise so that described ultrasonic transducer is in default duty:
Described actual electric power value is compared with default electrical power value, default maximum electromotive power output value;
When described actual electric power value is in default permission excursion, adjust input signal amplitude or the gain of the power amplifier of described ultrasonic transducer, so that described actual electric power value reaches default electrical power value; Or
When described actual electric power value exceeds default permission excursion, the alarm user; Or
When described actual electric power value exceeds default maximum electromotive power output value, cut off electrical power output and the alarm user of described ultrasonic transducer.
3. the method for supervising of the duty of ultrasonic transducer according to claim 1 is characterized in that, the described current duty of obtaining ultrasonic transducer comprises:
Adopt radiofrequency signal bidirectional power bonder that forward and the reverse radio-frequency signal of described ultrasonic transducer are measured, obtain its forward and reverse voltage signal, calculate the voltage reflection standing-wave ratio of described ultrasonic transducer;
The current duty of described ultrasonic transducer and default duty are controlled the running parameter of described ultrasonic transducer according to comparative result, comprise so that described ultrasonic transducer is in default duty:
Described voltage reflection standing-wave ratio is compared with predetermined threshold value, default max-thresholds;
When described voltage reflection standing-wave ratio is between predetermined threshold value and the default max-thresholds, adjust the power amplifier output of described ultrasonic transducer so that the voltage reflection standing-wave ratio of described ultrasonic transducer reaches predetermined threshold value; Or
When described voltage reflection standing-wave ratio is higher than default max-thresholds, cut off power amplifier output and the alarm user of described ultrasonic transducer.
4. the method for supervising of the duty of ultrasonic transducer according to claim 1 is characterized in that, the described current duty of obtaining ultrasonic transducer comprises:
Detect its fundamental frequency from the radiofrequency signal spectral domain of described ultrasonic transducer, and measure the voltage signal of ultrasonic transducer under the described fundamental frequency and the phase difference value of current signal;
The current duty of described ultrasonic transducer and default duty are controlled the running parameter of described ultrasonic transducer according to comparative result, comprise so that described ultrasonic transducer is in default duty:
Described phase difference value is compared with default phase difference value;
When described phase difference value exceeds the preset difference value scope, adjust the output radio frequency signal frequency of the power amplifier of described ultrasonic transducer, described phase difference value is in the preset difference value scope.
5. the supervising device of the duty of a ultrasonic transducer is characterized in that, comprising:
Acquisition module is for the current duty of obtaining ultrasonic transducer;
Processing module is used for the current duty of more described ultrasonic transducer and the duty of presetting;
Control module is for the running parameter of controlling described ultrasonic transducer according to comparative result, so that described ultrasonic transducer is in default duty.
6. the supervising device of the duty of ultrasonic transducer according to claim 5 is characterized in that, described acquisition module comprises:
First obtains submodule, be used for utilizing sample-hold circuit to carry out envelope detected to the input signal of described ultrasonic transducer, obtain respectively the voltage signal of described ultrasonic transducer and the range value of current signal, measure the voltage signal of described ultrasonic transducer and the phase contrast of current signal, according to the actual electric power value of range value and the described ultrasonic transducer of the two phase difference calculating of described voltage signal, current signal;
Described processing module comprises:
First processes submodule, is used for described actual electric power value is compared with default electrical power value, default maximum electromotive power output value;
Described control module comprises:
The first control submodule is used for adjusting input signal amplitude or the gain of the power amplifier of described ultrasonic transducer, so that described actual electric power value reaches default electrical power value when described actual electric power value is in default permission excursion; Or
When described actual electric power value exceeds default permission excursion, the alarm user; Or
When described actual electric power value exceeds default maximum electromotive power output value, cut off electrical power output and the alarm user of described ultrasonic transducer.
7. the supervising device of the duty of ultrasonic transducer according to claim 5 is characterized in that, described acquisition module comprises:
Second obtains submodule, is used for adopting radiofrequency signal bidirectional power bonder that forward and the reverse radio-frequency signal of described ultrasonic transducer are measured, and obtains its forward and reverse voltage signal, calculates the voltage reflection standing-wave ratio of described ultrasonic transducer;
Described processing module comprises:
Second processes submodule, is used for described voltage reflection standing-wave ratio is compared with predetermined threshold value, default max-thresholds;
Described control module comprises:
The second control submodule is used for when described voltage reflection standing-wave ratio is between predetermined threshold value and the default max-thresholds, adjusts the power amplifier output of described ultrasonic transducer so that the voltage reflection standing-wave ratio of described ultrasonic transducer reaches predetermined threshold value; Or
When described voltage reflection standing-wave ratio is higher than default max-thresholds, cut off power amplifier output and the alarm user of described ultrasonic transducer.
8. the supervising device of the duty of ultrasonic transducer according to claim 5 is characterized in that, described acquisition module comprises:
The 3rd obtains submodule, is used for detecting its fundamental frequency from the radiofrequency signal spectral domain of described ultrasonic transducer, and measures the voltage signal of ultrasonic transducer under the described fundamental frequency and the phase difference value of current signal;
Described processing module comprises:
The 3rd processes submodule, is used for described phase difference value is compared with default phase difference value;
Described control module comprises:
The 3rd control submodule is used for adjusting the output radio frequency signal frequency of the power amplifier of described ultrasonic transducer when described phase difference value exceeds the preset difference value scope, and described phase difference value is in the preset difference value scope.
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